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#481 | |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,925
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#482 |
Amiga user since 1989
Join Date: Nov 2009
Location: Spain
Age: 60
Posts: 119
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@Jope
Hi mate ![]() Status windows & tests appears to be OK. I will try this evening with AC power & -2 speed. ![]() Thanks a lot. More info soon.... |
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#483 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,925
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Status window and tests? There is no automatic test for the Vpp in EPROMs. You can only verify this yourself from the datasheet of the exact chip you are trying to program.
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#484 |
Amiga user since 1989
Join Date: Nov 2009
Location: Spain
Age: 60
Posts: 119
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Yes you're right.
I'm explained bad. I made the GQ-X4 programmer Vpp test, not the EPROM Vpp. I don't have the EPROM datasheets, but they are AMD / AM27C400-120 (-50, -100) / 1991 I tought these are the good ones, right? I'm testing with the -120 ...... |
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#485 | ||
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,925
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Once you've verified that they are being programmed with the right voltage and they still don't hold the bits in, then they have probably been over-erased and cannot be programmed any more. Unfortunately in this case the only thing you can do is see if you can return them and get a refund from the seller. |
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#486 |
Amiga user since 1989
Join Date: Nov 2009
Location: Spain
Age: 60
Posts: 119
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@Jope
Thanks for the info. ![]() As I said, I will try again this evening with AC power at -2 speed.... |
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#487 |
We need more scans!
Join Date: Feb 2010
Location: Copenhagen / Denmark
Age: 49
Posts: 326
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what are the error messages that you get ?
the eproms could be from a bad batch, so they are defective. don't forget to let the willem programmer settle before starting. which means, start the application, click somewhere in the interface, and wait 2 min before inserting the eprom. |
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#488 | |||
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,925
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The error message is that there is a mismatch between the buffer and what got written to the chip.
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Is that advice valid for the MCUMall.com GQ series of prommers that we're discussing? These don't use the normal Willem software and I personally have never felt the need to wait for it to settle. |
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#489 | ||
We need more scans!
Join Date: Feb 2010
Location: Copenhagen / Denmark
Age: 49
Posts: 326
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is a modified version of the same and has a usb controller instead of the parallel port. so yes :-) if you feel like it, you can try and program an eprom with pure zero's this will program all cells (when erased, all bits are 1) |
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#490 |
Amiga user since 1989
Join Date: Nov 2009
Location: Spain
Age: 60
Posts: 119
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Hi again,
Blank Check: OK Writing 27C400's with 00.... 100% OK ![]() But writing any rom/bin image to 27C400's.... stops at the first bytes... ![]() |
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#491 | |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,925
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Quote:
Very curious behaviour though, however I'm not surprised in the least.. I remember having quite a bit of trouble with the parallel one. :-) |
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#492 |
Amiga user since 1989
Join Date: Nov 2009
Location: Spain
Age: 60
Posts: 119
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Hi,
I made another more test, Readed one original KS 2.05.... COMMODORE-AMIGA 391304-02 047 1992 V2-05 37-350 9238XD001 ... in the programmer as 27C400. Yes I know is not compatible but the programmer as readed the data from the original KS (not usable, of course). - I saved the buffer as bin - Inserted blank EPROM 27C400 - Write/Verify buffer to the EPROM with 100% success So, I tought the programmer works fine and can program the 27C400's...... Maybe is needed any special config for the Amiga .rom images? Any idea? Thanks Last edited by merlinkv; 15 November 2011 at 05:33. |
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#493 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,925
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Did you try to burn the same chip every time?
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#494 |
Amiga user since 1989
Join Date: Nov 2009
Location: Spain
Age: 60
Posts: 119
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#495 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,925
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At least you found one working unit. :-)
Be careful when erasing, do it in 5min bursts and then blank check and put it back if it's not blank yet. EPROMs are easily ruined if you over-expose them to UV. |
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#496 |
Registered User
Join Date: Apr 2007
Location: Belgrade
Posts: 567
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I also think his eprom is worn out/overexposed. its unusable now.
5min might also be too much, have a look here: http://wiki.xtronics.com/index.php/How_EPROMS_Work |
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#497 |
Registered User
Join Date: Oct 2011
Location: Sydney
Posts: 119
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Tried mx27c4100 c10 on GQ-4X via USB and no power adapter, two different chips, same error, I'm using the ADP-054 adapter, the chip is inserted correctly at bottom of the larger zif socket and verified blank before programming.
After failed write the following reads back from both chips; 11 10 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ... ... Ready H/W Re: GQ-4X Re-1.40 USB Driver Re.1.0 Software Re. 6.13 Checking new software on server... <<MX27C4100>> Put chip in 42 pin socket and bottom aligned with the socket. This software is updated already. ID check skipped Writing... Code Elapsed time: 0.26 seconds. Write failed, Address=0x000001, Buffer=0x14 Device=0x10 Write failed ID check skipped Writing... Code Elapsed time: 0.26 seconds. Write failed, Address=0x000001, Buffer=0x14 Device=0x10 Write failed ID check skipped Blank checking... Code Elapsed time: 3.31 seconds. Chip is blank c:\users\admin\desktop\my_kickstart_31_r40_63.rom. ID check skipped Writing... Code Elapsed time: 0.26 seconds. Write failed, Address=0x000001, Buffer=0x14 Device=0x10 Write failed ID check skipped Reading... Code Elapsed time: 3.32 seconds. Read completed. |
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#498 |
Registered User
Join Date: Apr 2007
Location: Belgrade
Posts: 567
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one thing that might help a bit, is increasing time delays (iirc, there are two sliders in willem), and trying again and again. I managed to write one eprom that way. but it can't be erased now.
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#499 | |
Registered User
Join Date: Oct 2011
Location: Sydney
Posts: 119
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Can you provide the log window text output, I'd like to compare USB Driver Version etc. Also provide the HEX values after reading back a failed write to compare to mine. |
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#500 |
Registered User
Join Date: Oct 2011
Location: Sydney
Posts: 119
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I suspect it's the difference between the *.rom file and *.bin file
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